Information display apparatus having at least two touch screens and information display method thereof

ABSTRACT

A method and apparatus for displaying information on at least two touch screens are provided. The method includes sensing a first touch-drag on a first touch screen; sensing a first touch on a second touch screen; and displaying, on at least one of the first and second touch screens, information corresponding to the first touch-drag on the first touch screen and the touch on the second touch screen, if the touch-drag on the first touch screen and the first touch on the second touch screen are simultaneously sensed.

PRIORITY

This application claims priority under 35 U.S.C. §119(a) to a U.S.patent application filed in the U.S. Patent and Trademark Office on Feb.10, 2011 and assigned Ser. No. 61/441,491 and a Korean PatentApplication filed in the Korean Intellectual Property Office on Jun. 20,2011 and assigned Serial No. 10-2011-0059500, the entire contents ofboth of which are incorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to an information displayapparatus having at least two touch screens and an information displaymethod thereof, and more particularly, to an information displayapparatus for displaying information corresponding to a user's gestureon at least one of two touch screens and an information display methodthereof.

2. Description of the Related Art

Conventionally, a user controls information displayed on a touch screenin an information display apparatus having a single touch screen, usingonly one finger, for example, an index finger. Now, information displayapparatuses having two touch screens have started to emerge in order todisplay more information and increase device portability.

However, it is inconvenient for a user to rapidly process information ontouch screens using one finger in an information display apparatus withtwo touch screens. Accordingly, there exists a need for rapidlyprocessing information according to a user's gestures made withdifferent fingers on the left and right touch screen, respectively (suchas, for example, a left thumb or index finger on a left touch screen andwith a right thumb or index finger on a right touch screen).

SUMMARY OF THE INVENTION

An aspect of embodiments of the present invention is to address at leastthe problems and/or disadvantages and to provide at least the advantagesdescribed below. Accordingly, an aspect of embodiments of the presentinvention is to provide an information display apparatus having at leasttwo touch screens, for rapidly displaying and processing information onthe at least two touch screens, and an information display methodthereof.

In accordance with an embodiment of the present invention, a method fordisplaying information on at least two touch screens is provided. Themethod includes sensing a first touch-drag on a first touch screen;sensing a first touch on a second touch screen; and displaying, on atleast one of the first and second touch screens, informationcorresponding to the first touch-drag on the first touch screen and thetouch on the second touch screen, if the touch-drag on the first touchscreen and the first touch on the second touch screen are simultaneouslysensed.

In accordance with another embodiment of the present invention, there isprovided an apparatus for displaying information on at least two touchscreens. The apparatus includes a first touch screen for sensing a firsttouch-drag on the first touch screen; a second touch screen for sensinga first touch on the second touch screen; and a processor forcontrolling, on at least one of the first and second touch screens,display of information corresponding to the first-touch drag on thefirst touch screen and the first touch on the second touch screen, ifthe first touch-drag on the first touch screen and the first touch onthe second touch screen are simultaneously sensed.

In accordance with a further embodiment of the present invention, thereis provided a computer-readable recording medium that stores a programfor executing a method for displaying information on at least two touchscreens. The method includes sensing a first touch-drag on a first touchscreen; sensing a first touch on a second touch screen; and displaying,on at least one of the first and second touch screens, informationcorresponding to the first touch-drag on the first touch screen and thefirst touch on the second touch screen, if the first touch-drag on thefirst touch screen and the first touch on the second screen aresimultaneously sensed.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of certainembodiments of the present invention will be more apparent from thefollowing detailed description taken in conjunction with theaccompanying drawings, in which:

FIG. 1 is a block diagram of an information display apparatus accordingto an embodiment of the present invention;

FIG. 2A is a diagram illustrating the information display apparatusaccording to the embodiment of the present invention;

FIGS. 2B and 2C are diagrams illustrating the display apparatus alongwith fingers with which a user uses the information display apparatusaccording to the embodiment of the present invention;

FIG. 3 is a diagram illustrating a user's gestures made on first andsecond screens according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating a user's gestures made on the first andsecond screens according to another embodiment of the present invention;

FIGS. 5A and 5B are diagrams illustrating a user's gestures made on thefirst and second screens according to another embodiment of the presentinvention;

FIG. 6 is a diagram illustrating a user's gestures made on the first andsecond screens according to another embodiment of the present invention;

FIG. 7 is a diagram illustrating a user's gestures made on the first andsecond screens according to another embodiment of the present invention;

FIG. 8 is a diagram illustrating a user's gestures made on the first andsecond screens according to another embodiment of the present invention;

FIGS. 9A and 9B is a diagram illustrating a user's gestures made on thefirst and second screens according to another embodiment of the presentinvention;

FIG. 10 is a diagram illustrating a user's gestures made on the firstand second screens according to a further embodiment of the presentinvention;

FIG. 11 is a flowchart illustrating an operation of the informationdisplay apparatus according to an embodiment of the present invention;

FIG. 12 is a block diagram of a processor in the information displayapparatus according to an embodiment of the present invention; and

FIG. 13 is a block diagram of a display unit in the processor accordingto an embodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE PRESENT INVENTION

Reference will now be made in detail to the preferred embodiments of thepresent invention with reference to the accompanying drawings. Likereference numerals denote the same components throughout thespecification and the drawings. A detailed description of a generallyknown function and structure of the present invention will be avoidedlest it should obscure the subject matter of the present invention.Throughout the drawings, the same drawing reference numerals may beunderstood to refer to the same or similar elements, features, andstructures.

Herein, a user's gesture refers to a motion that a user makes in orderto display or control information on a touch screen. The gestures may beperformed using, but are not limited to, the user's left and rightfingers, such as, index fingers and/or thumbs. Although the followingexamples refers to using fingers for various touch gestures forconvenience of description, embodiments of the present invention are notlimited to user touches initiated by a user's finger, and other ways ofproviding gestures to the touch screen, such as by a stylus, etc., maybe used in accordance with embodiments of the present invention.

Examples herein refer to sensing “simultaneous” touch actions, such assimultaneous sensing of a touch drag and a touch or a first touch dragand a second touch drag. Throughout the application, simultaneoussensing or sensing of simultaneous touch actions includes cases whereboth touch actions are literally performed simultaneously, cases whereone touch action occurs during another touch action, and cases wherethere is an overlap between the respective time periods of at least twotouch actions. Such touch actions and sensing of such touch actions areconsidered to be simultaneous irrespective of which touch action isinitiated first.

A user's gestures may include, for example, a touch, a touch release, arotation, a pinch, a spread, a touch drag, etc. Among such gestures, atouch drag gesture is performed by touching a finger on a touch screenand then moving the finger to another position in a specific directionon the touch screen in a touched state. The touch drag gesture mayinclude gestures such as a touch and drag, a flick, a swipe, etc.Herein, the term “touched state” refers to a touch on a touch screen ora very near approach onto the touch screen without actually touching thetouch screen.

According to embodiments of the present invention, the informationdisplay apparatus may be any of a broad range of devices that display anapplication or content, such as a tablet Personal Computer (PC), aPortable Multimedia Player (PMP), a Personal Digital Assistant (PDA), asmart phone, a portable phone, and a digital photo frame.

FIG. 1 is a block diagram of an information display apparatus accordingto an embodiment of the present invention.

Referring to FIG. 1, an information display apparatus 100 may include afirst touch screen 110, a second touch screen 120, a processor 130, anda memory 140.

Each of the touch screens 110 and 120 may include a display panel and atouch sensor (not shown). The display panel may be, for example, aPlasma Display Panel (PDP), an Electronic Paper Display (EPD) panel, aLiquid Crystal Display (LCD) panel, a Light emitting Polymer Display(LPD) panel, an Organic Light-Emitting Diode (OLED) panel, or anActive-matrix Organic Light-Emitting Diode (AMOLED) panel. The touchsensor may be provided at one side of the display panel, for sensing auser's gesture. The touch sensor may be implemented into a capacitive,resistive, infrared, or surface acoustic wave touch sensor.

FIG. 2A is a diagram illustrating the information display apparatusaccording to the embodiment of the present invention.

Referring to FIG. 2A, the first and second screens 110 and 120 may befolded or unfolded up to a predetermined angle with respect to a centralaxis 230. A hinge for connecting the first touch screen 110 to thesecond touch screen 120 or a part of a flexible screen may serve as thecentral axis 230.

FIGS. 2B and 2C are diagrams illustrating the display apparatus alongwith fingers with which a user uses the information display apparatusaccording to the embodiment of the present invention.

Referring to FIG. 2B, a user may make gestures on the first and secondtouch screens 110 and 120 with his or her fingers (e.g., index fingersor thumbs). For instance, if the information display apparatus 100 isput on or set up to rest on a surface such as a desk, the user may makegestures on the first and second touch screens 110 and 120 using theuser's left and right index fingers 281 and 282, as illustrated in FIG.2B. Referring to FIG. 2C, the user may grab the information displayapparatus 100 with his or her fingers and make gestures on the first andsecond touch screens 110 and 120 with his or her thumbs 291 and 292.

Referring to FIG. 1 again, at least one processor 130 and the memory 140may be disposed under at least one of the touch screens 110 and 120.

The memory 140 may store programs required to implement variousembodiments of the present invention, applications, content, and othervarious data. The memory 140 may include at least one of a volatilememory and a non-volatile memory. For example, the memory 140 mayinclude a non-volatile memory such as a Read Only Memory (ROM), anElectrically Erasable and Programmable ROM (EEPROM), or a flash memory,for storing programs used for implementation of the present invention,and/or a Dynamic Random Access Memory (DRAM) or Static RAM (SRAM) fortemporarily storing data to process information during power supply. Inaddition, at least a part of the memory 140 may be removable from theinformation display apparatus 100. For example, a Compact Flash (CF)card, a Secure Digital (SD) card, a Smart Media (SM) card, a MultiMediaCard (MMC), or a memory stick may be used as the removable part of thememory 140. The removable part (not shown) of the memory 140 may storevarious data, which may include downloaded from an external device.

The processor 130 provides overall control to the components of theinformation display apparatus 100. For example, methods for implementingcertain operations according to various embodiments of the presentinvention may be implemented as programs stored in the memory 140 inconjunction with operations performed by hardware itself. According tothe present invention, the processor 130 or hardware of the informationdisplay apparatus 100 detects simultaneous occurrence of a first touchdrag on the first touch screen 110 and a second touch on the secondtouch screen 120 and thus may display information corresponding to thefirst touch drag and the second touch on at least one of the first andsecond touch screens 110 and 120.

FIG. 3 is a diagram illustrating a user's gestures made on first andsecond screens according to an embodiment of the present invention.

Referring to the left drawing (a) of FIG. 3, the information displayapparatus 100 may display first information 310 on the first touchscreen 110 and second information 330 on the second touch screen 120.The user may make a gesture on each of the first and second touchscreens 110 and 120 based on the first and second information 310 and330.

The information display apparatus 100 may sense a touch and upward drag(i.e., a first touch drag 312 on the first screen 110 and a second touch331 on the second touch screen 120. The first touch drag 312 isperformed by making a touch 311 on the first touch screen 110 and thendragging, along the direction indicated by reference numeral 312 toanother position 313.

Upon simultaneously sensing the first touch drag 312 and the secondtouch 331, the information display apparatus 100 may display informationcorresponding to the first touch drag 312 and the second touch 331 on atleast one of the first and second touch screens 110 and 120.Simultaneous sensing of the first touch drag 312 and the second touch331 means sensing the first touch drag 312 made by a left index fingeror thumb and the second touch 331 made by a right index finger or thumbirrespective of their order.

Referring to the right drawing (b) of FIG. 3, the information displayapparatus 100 may display information 360 and 330 corresponding to thefirst touch drag 311, 312, and 313 and the second touch 331 on the firstand second touch screens 110 and 120. For example, the informationdisplay apparatus 100 may display the information 360 other than theinformation 310 on the first touch screen 110, in correspondence withthe first touch drag 311, 312, and 313, and may keep displaying theinformation 330 on the second touch screen 120, in correspondence withthe second touch 331. For example, the information display apparatus 100may display an application 360 other than an application 310 on thefirst touch screen 110, in correspondence with the first touch drag 311,312, and 313 sensed from the first touch screen 120 and may maintain anapplication 330 displayed on the second touch screen 110, incorrespondence with the second touch 331 sensed from the second touchscreen 120.

FIG. 4 is a diagram illustrating a user's gestures made on the first andsecond screens according to another embodiment of the present invention.

Referring to the left drawing (a) of FIG. 4, the information displayapparatus 100 may simultaneously sense a downward first touch drag 411on the first touch screen 110 and a downward second touch drag 431 onthe second touch screen 120.

Referring to the right drawing (b) of FIG. 4, the information displayapparatus 100 may display information 460 and 480 corresponding to thefirst touch drag 411 and the second touch drag 431, respectively, on thefirst and second touch screens 110 and 120. For example, upon sensingthe first touch drag 411, the information display apparatus 100 maydisplay an application 460 other than an application 410 on the firsttouch screen 110. Upon sensing the second touch drag 431, theinformation display apparatus 100 may display an application 480 otherthan an application 430 on the second touch screen 120.

FIGS. 5A and 5B are diagrams illustrating a user's gestures made on thefirst and second screens according to another embodiment of the presentinvention.

Referring to the left drawing (a) of FIG. 5A, when the informationdisplay apparatus 100 senses an upward first touch drag 506 on the firsttouch screen 110 simultaneously with a second touch 516 on the secondtouch screen 120, the apparatus 100 may determine the dragging directionof the first touch drag 506 and thus may display informationcorresponding to the first drag 506 and the second touch 516 on at leastone of the first and second touch screens 110 and 120 according to thedragging direction. For example, the information display apparatus 100may sense that the touch and drag 506 has been made in a first direction(i.e. upward), as illustrated in the left drawing (a) of FIG. 5A.

The apparatus 100 may also sense that a touch drag 556 has been made ina second direction (i.e. downward), as illustrated in the left drawing(a) of FIG. 5B. If a plurality of pieces of information is arranged in apredetermined order (e.g., a plurality of applications having apredetermined order are being executed as the plurality of pieces ofinformation), the information display apparatus 100 may sequentiallydisplay the plurality of pieces of information in the predeterminedorder according to the first or second direction. For example, referringto the right drawing (b) of FIG. 5A, the information display apparatus100 may display information 525 earlier in sequence than information 505on the first touch screen 110 according to the touch drag 506 made inthe first direction, and may keep displaying information 515 on thesecond touch screen 120 according to the second touch 516.

In another example, referring to the right drawing (b) of FIG. 5B, theinformation display apparatus 100 may display information 575 next toinformation 555 on the first touch screen 110 according to the touchdrag 556 made in the second direction, and may keep displayinginformation 565 on the second touch screen 120 according to a secondtouch 566.

FIG. 6 is a diagram illustrating a user's gestures made on the first andsecond screens according to another embodiment of the present invention.

Referring to the left drawing (a) of FIG. 6, the information displayapparatus 100 may simultaneously sense a first touch drag 611 made in afirst direction on the first touch screen 110 and a second touch drag631 made in a second direction on the second touch screen 120. As aresult, the information display apparatus 100 may display firstinformation 660 corresponding to the first touch drag 611 made in thefirst direction on the first touch screen 110 and second information 680corresponding to the second touch drag 631 made in the second directionon the second touch screen 120, as illustrated in the right drawing (b)of FIG. 6. Each of the first and second information 660 and 670 maycorrespond to at least one of a plurality of applications being executedin the information display apparatus 100. For instance, if a pluralityof applications are divided into first and second groups, information610 and 660 displayed on the first touch screen 110 may be applicationsof the first group, whereas information 630 and 680 displayed on thesecond touch screen 120 may be applications of the second group.

FIG. 7 is a diagram illustrating a user's gestures made on the first andsecond screens according to another embodiment of the present invention.

Referring to the left drawing (a) of FIG. 7, the information displayapparatus 100 may simultaneously sense a first touch drag 711 made in afirst direction on the first touch screen 110 and a second touch drag731 made in a second direction on the second touch screen 120. Thedirection of the first touch drag 711 may be towards the second touchscreen 120 (i.e., to the right), while the direction of the second touchdrag 731 may towards the first touch screen 110 (i.e., to the left).Thus, the first and second directions may be mutually approachingdirections.

Referring to the right drawing (a) of FIG. 7, the information displayapparatus 100 may exchange information 710 displayed on the first touchscreen 110 with information 730 displayed on the second touch screen 120in accordance with the first touch drag 711 and the second touch drag731. For example, the information display apparatus 100 may exchange thepositions of an application 710 displayed on the first touch screen 110and an application 730 displayed on the second touch screen 120. Inother words, the information display apparatus 100 may display theapplication 730, which was previously displayed on the second touchscreen 120, on the first touch screen 110, and may display theapplication 710, which was previously displayed on the first touchscreen 110, on the second touch screen 120.

Referring to the upper left drawing (a) of FIG. 8, the informationdisplay apparatus 100 may simultaneously sense a first touch drag 806made in a first direction on the first screen 110 and a second touchdrag 811 made in a second direction on the second screen 120. Thedirection of the first touch drag 806 may be a direction moving awayfrom the second touch screen 120, the direction of the second touch drag806 may be a direction moving away from the first touch screen 110.Thus, the directions of the first and second touch drags 806 and 811 maymutually move away from each other.

FIG. 8 is a diagram illustrating a user's gestures made on the first andsecond screens according to another embodiment of the present invention.

Referring to the upper right drawing (b) of FIG. 8, the informationdisplay apparatus 100 may display all applications 821 to 827 availableby a touch drag, in correspondence with the first touch drag 806 and thesecond touch drag 811, on at least one of the first and second touchscreens 110 and 120.

A user may change the position of at least one of the applications 821to 827 displayed on the first and second touch screens 110 and 120. Forexample, when the user touches one of the applications 821 to 827, theselected application may be moved to the forefront position. Inaddition, if a first application among the applications 821 to 827 istouched and dragged to a second application, the positions of the firstand second applications may be exchanged.

Referring to the upper right drawing (b) of FIG. 8, with the pluralityof applications 821 to 827 displayed on the first and second touchscreens 110 and 120, the information display apparatus 100 maysimultaneously sense a first touch drag 821 on the first touch screen110, made in a direction towards the second touch screen 120 and asecond touch drag 832 on the second touch screen 120, made in adirection towards the first touch screen 110. Upon simultaneouslysensing the first and second touch drags 821 and 832 the informationdisplay apparatus 100 may fullscreen the forefront applications 821 and827 from among the applications 821 to 827 on the first and second touchscreens 110 and 120, respectively, in response to the first touch drag831 and the second touch drag 832, such as shown in the lower drawing(c) of FIG. 8.

Referring to FIGS. 9A and 9B, the information display apparatus 100 maydisplay information corresponding to a first touch drag 906 on the firsttouch screen 110 and a second touch 911 on the second touch screen 120,or may only display information corresponding to the first touch drag906, depending on whether the information display apparatus 100 hassimultaneously sensed the first touch drag 906 and the second touch 911.

FIGS. 9A and 9B is a diagram illustrating a user's gestures made on thefirst and second screens according to another embodiment of the presentinvention.

Referring to FIG. 9A, upon simultaneously sensing the first touch drag906 and the second touch 911, the information display apparatus 100 maydisplay, on the first touch screen 110, an application 925 other than anapplication 905 that displayed before the first touch drag 906 wassensed, according to the first touch drag 906. Meanwhile, the apparatus100 may keep displaying, on the second touch screen 120, an application910 that was displayed before the second touch 911 was sensed, accordingto the second touch 911.

Referring to FIG. 9B, if the information display apparatus 110 does notsense a first touch drag 956 and the second touch 911 at the same time(e.g. the second touch drag 911 and then the first touch drag 956 aresensed), it may change the position of content 958 in an application 955displayed on the first touch screen 110, in correspondence with thefirst touch drag 956. For example, the information display apparatus 100may exchange the position of content corresponding to the start of thefirst touch drag 956 with the position of content corresponding to theend of the first touch drag 956, in accordance with the first touch drag956. That is, the information display apparatus 100 may move content 958or exchange the positions of the content 958 and content 959.

FIG. 10 is a diagram illustrating a user's gestures made on the firstand second screens according to a further embodiment of the presentinvention.

Referring to FIG. 10, upon sensing a first touch drag 1006 on the firsttouch screen 110 and a second touch 1011 on the second touch screen asshown in upper left drawing (a) of FIG. 10, the information displayapparatus 100 may sequentially arrange existing information 1005 thatwas displayed before the first touch drag 1006 was sensed, and may alsodisplay information 1025 displayed after sensing the first touch drag1006 as shown in the upper right drawing (b) of FIG. 10. For example,the information display apparatus 100 may display both the application1005 that was already displayed before the first touch drag 1006 wassensed, as well as display the application 1025 after the first touchdrag 1006 is sensed, on the first touch screen 110 during the firsttouch drag 1006 in progress. During the first touch drag 1006, the areaover which the application 1005 is displayed on the first touch screen110 may decrease, whereas the area over which the application 1025 isdisplayed may increase on the first touch screen 110. Upon completion ofthe first touch drag 1006, the first touch screen 110 may display onlythe application 1025 corresponding to the first touch drag 1006, such asillustrated in the lower drawing (c) of FIG. 10.

FIG. 11 is a flowchart illustrating an operation of the informationdisplay apparatus according to an embodiment of the present invention.

Referring to FIG. 11, the information display apparatus 100 maysimultaneously sense a first touch drag on the first touch screen 110and a second touch on the second touch screen 120 in step 1101. If theinformation display apparatus 100 has sensed the first touch drag andthe second touch in step 1101, the information display apparatus 100 maydetermine whether the sensed first touch drag and the second touch aresimultaneous in step 1103.

Upon a determination that the first touch drag and the second touch aresimultaneously sensed, the information display apparatus 100 may displayinformation corresponding to the first touch drag and the second touchon at least one of the first and second touch screens 110 and 120 instep 1105. For example, the information display apparatus 100 maydisplay an application other than an existing application on the firsttouch screen 110, while maintaining an existing application on thesecond touch screen, such as illustrated in FIG. 9A.

However, if the first touch drag and the second touch are not sensedsimultaneously, the information display apparatus 100 may displayinformation corresponding to the first touch drag on the first touchscreen 110 in step 1107. For instance, the information display apparatus100 may change the position of content in an application displayed onthe first touch screen 110, according to the first touch drag.

FIG. 12 is a block diagram of a processor in the information displayapparatus according to an embodiment of the present invention.

Referring to FIG. 12, the processor 130 may include an input unit 131, adecider 132, and a display unit 133.

The input unit 131 may receive a sensed signal corresponding to a firsttouch or a first touch drag sensed from the first touch screen 110, andmay also receive a sensed signal corresponding to a second touch or asecond touch drag sensed from the second touch screen 120.

The decider 132 may determine whether the first touch drag and thesecond touch have been sensed simultaneously, using the sensed signalsreceived from the input unit 131.

If the first touch drag and the second touch have been sensedsimultaneously, the display unit 133 may control display of informationcorresponding to the first touch drag and the second touch on at leastone of the first and second touch screens 110 and 120. For example, thedisplay unit 133 may control display of an application other than analready-displayed application on the first touch screen 110, whilemaintaining an already-displayed application on the second touch screen120.

If a first touch drag and a second touch drag are sensed from the firstand second touch screens 110 and 120, respectively through the inputunit 131, the display unit 133 may control display of applications otherthan already-displayed applications on the first and second touchscreens 110 and 120, in correspondence with the first touch drag and thesecond touch drag.

When displaying information corresponding to a first touch drag and asecond touch, the display unit 133 may control display of one of aplurality of pieces of information on at least one of the first andsecond touch screens 110 and 120, according to a predetermined order.

In addition, the display unit 133 may control display of informationdisplayed before sensing the first touch drag, together with andinformation to be displayed after sensing the first touch drag, duringthe first touch drag in progress.

FIG. 13 is a block diagram of a display unit in the processor accordingto an embodiment of the present invention.

Referring to FIG. 13, the display unit 133 may include a multi-touchdisplay unit 134 and a single-touch display unit 135.

When a first touch drag and a second touch are sensed simultaneously,the multi-touch display 134 may display information corresponding to thefirst touch drag and the second touch on the first touch screen 110. Forexample, the multi-touch display 134 may display an application otherthan an already-display application on the first touch screen 110, whilemaintaining an already-displayed application on the second touch screen120.

When the first touch drag and the second touch are not sensedsimultaneously, the single-touch display 135 may display informationcorresponding to the first touch drag on the first touch screen 110. Forexample, the single-touch display 135 may change the position of contentin an application displayed on the first touch screen 110, incorrespondence with the first touch drag.

As is apparent from the description of the present invention, a user canprocess information displayed on at least two touch screens, quickly andsimultaneously. For example, the user may display a new application onat least one or each of the two touch screens without using anadditional menu. In addition, the user may exchange applications betweenthe two touch screens.

Certain aspects of the information display method in the informationdisplay apparatus according to the foregoing embodiments may beimplemented as program commands that can be written to acomputer-readable recording medium and can thus be read by variouscomputer-aided means. Such a computer-readable recording medium mayinclude program commands, a data file, a data structure, etc. alone orin combination. Program commands written on the computer-readablerecording medium may be designed and configured specially for thepresent invention or known to those skilled in the art of computersoftware. Such a computer-readable recording medium may be any type ofrecording device in which data can be stored in a computer-readablemanner. Examples of a computer-readable recording medium include amagnetic medium such as a hard disk, a floppy disk, and a magnetic tape,an optical medium such as a Compact Disc (CD)-Read Only Memory (ROM) ora Digital Versatile Disc (DVD), a magneto-optical medium such as afloptical disk, a hardware device configured specially to store andexecute program commands such as a ROM, a Random Access Memory (RAM),and a flash memory. Examples of a program command include a high-levellanguage code that can be executed in a computer by means of aninterpreter as well as a machine language code such as created by acompiler. The hardware device may be configured to operate as one ormore software modules to perform operations of the present invention,and vice versa.

While the present invention has been particularly shown and describedwith reference to embodiments thereof, it will be understood by those ofordinary skill in the art that various changes in form and details maybe made therein without departing from the spirit and scope of thepresent invention as defined by the following claims.

1. A method for displaying information on at least two touch screens, the method comprising: sensing a first touch-drag on a first touch screen; sensing a first touch on a second touch screen; and displaying, on at least one of the first and second touch screens, information corresponding to the first touch-drag on the first touch screen and the touch on the second touch screen, if the touch-drag on the first touch screen and the first touch on the second touch screen are simultaneously sensed.
 2. The method of claim 1, wherein the first touch-drag on the first touch screen is performed by touching the first touch screen at a first position and dragging from the first position to a second position.
 3. The method of claim 1, wherein simultaneously sensing the first touch-drag on the first touch screen and the first touch on the second touch screen is one of simultaneous sensing of the first touch-drag on the first touch screen and the first touch on the second touch screen, sensing of the first touch on the second touch screen during the first touch-drag on the first touch screen, and sensing of the first touch-drag on the first touch screen during the first touch on the second touch screen.
 4. The method of claim 1, wherein displaying the information corresponding to the first touch-drag on the first touch screen and the first touch on the second touch screen comprises: displaying, on the first touch screen, an application other than an application already displayed on the first touch screen, and maintaining, on the second touch screen, an application already displayed on the second touch screen.
 5. The method of claim 1, wherein sensing the first touch on the second touch screen further comprises: sensing a second touch-drag performed by dragging the first touch on the second touch screen, and wherein displaying the information corresponding to the first touch-drag on the first touch screen and the first touch on the second touch screen comprises displaying, on the first screen, an application other than an application already displayed on the first touch screen, and displaying, on the second touch screen, an application other than an application already displayed on the second touch screen.
 6. The method of claim 1, wherein sensing the first-touch drag on the first touch screen further comprises sensing a dragging direction of the first touch-drag on the first touch screen, and wherein displaying the information corresponding to the first touch drag on the first touch screen and the first touch on the second touch screen comprises displaying, on the at least one of the first and second touch screens, the information corresponding to the first touch-drag on the first touch screen and the first touch on the second touch screen.
 7. The method of claim 1, wherein displaying the information corresponding to the first touch-drag on the first touch screen and the first touch on the second touch screen comprises displaying, on the at least one of the first and second touch screens, one of a plurality of pieces of information having a predetermined order according to the predetermined order.
 8. The method of claim 1, wherein sensing the first touch on the second touch screen further comprises: sensing a second touch-drag performed by dragging the first touch on the second touch screen, and wherein displaying the information corresponding to the first touch-drag on the first touch screen and the first touch on the second touch screen comprises displaying, on the first screen, an application other than an application already displayed on the first touch screen, and displaying, on the second touch screen, an application other than an application already displayed on the second touch screen.
 9. The method of claim 7, wherein displaying the information corresponding to the first touch-drag on the first touch screen and the second touch-drag comprises exchanging, on the first and second touch screens, the application already displayed on the first touch screen with the application already displayed on the second touch screen.
 10. The method of claim 7, wherein displaying the information corresponding to the first touch-drag on the first touch screen and the second touch drag comprises displaying, on the first and second touch screens, a plurality applications available for selection.
 11. The method of claim 1, wherein displaying the information corresponding to the first touch-drag on the first touch screen and the first touch on the second touch screen comprises displaying, while the first touch-drag on the first touch screen is in progress, information already displayed before sensing the first touch drag together with information to be displayed after sensing the first touch drag is completed.
 12. The method of claim 1, further comprising changing a position of content in an application displayed on the first touch screen, if the first touch drag and the second touch are not simultaneously sensed.
 13. An apparatus for displaying information on at least two touch screens, the apparatus comprising: a first touch screen for sensing a first touch-drag on the first touch screen; a second touch screen for sensing a first touch on the second touch screen; and a processor for controlling, on at least one of the first and second touch screens, display of information corresponding to the first-touch drag on the first touch screen and the first touch on the second touch screen, if the first touch-drag on the first touch screen and the first touch on the second touch screen are simultaneously sensed.
 14. The apparatus of claim 13, wherein the processor includes a display unit for, when displaying the information corresponding to the first touch-drag on the first touch screen and the first touch on the second touch screen, displaying, on the first touch screen, an application other than an application already displayed on the first touch screen, and maintaining, on the second touch screen, an application already displayed on the second touch screen.
 15. The apparatus of claim 13, wherein the processor comprises: an input unit for sensing a second touch-drag for dragging the second touch on the second touch screen, and a display unit for controlling, in response to sensing of the second touch-drag, display of an application that is different from an application displayed on the first touch screen, and display of another application that is different from an application displayed on the second touch screen.
 16. The apparatus of claim 13, wherein the processor comprises: an input unit for sensing a dragging direction of the first touch-drag on the first touch screen; and a display unit for controlling display of, on the at least one of the first and second touch screens, the information corresponding to the first touch-drag on the first touch screen and the second touch according to the dragging direction of the first touch-drag on the first touch screen.
 17. The apparatus of claim 13, wherein the processor includes a display unit for, when the information corresponding to the first touch drag and the second touch are displayed, controlling display of information already displayed before the sensing of the first-touch drag on the first touch screen together with information to be displayed after sensing the first touch drag, during the first touch drag in progress.
 18. The apparatus of claim 13, wherein the processor comprises: a multi-touch display unit for controlling display of, on the first touch screen, the information corresponding to the first touch-drag on the first touch screen and the first touch on the second touch screen, when the first touch-drag on the first touch screen and the first touch on the second touch screen are simultaneously sensed; and a single-touch display unit for controlling display of, on the first touch screen, information corresponding to the first touch-drag on the first touch screen, when the first touch-drag on the first touch screen and the first touch on the second touch screen are not simultaneously sensed.
 19. The apparatus of claim 18, wherein when displaying the information corresponding to the first touch drag on the first touch screen, the single-touch display unit changes a position of content in an application displayed on the first touch screen, in correspondence with the first touch-drag on the first touch screen.
 20. A non-transitory computer-readable recording medium that stores a program for executing a method for displaying information on at least two touch screens, the method comprising: sensing a first touch-drag on a first touch screen; sensing a first touch on a second touch screen; and displaying, on at least one of the first and second touch screens, information corresponding to the first touch-drag on the first touch screen and the first touch on the second touch screen, if the first touch-drag on the first touch screen and the first touch on the second screen are simultaneously sensed. 